class SniffSettingsHelper

class SniffSettingsHelper {
    
    /**
     * @param string|int $settings
     */
    public static function normalizeInteger($settings) : int {
        return (int) trim((string) $settings);
    }
    
    /**
     * @param string|int|null $settings
     */
    public static function normalizeNullableInteger($settings) : ?int {
        return $settings !== null ? (int) trim((string) $settings) : null;
    }
    
    /**
     * @param list<string> $settings
     * @return list<string>
     */
    public static function normalizeArray(array $settings) : array {
        $settings = array_map(static function (string $value) : string {
            return trim($value);
        }, $settings);
        $settings = array_filter($settings, static function (string $value) : bool {
            return $value !== '';
        });
        return array_values($settings);
    }
    
    /**
     * @param array<int|string, int|string> $settings
     * @return array<int|string, int|string>
     */
    public static function normalizeAssociativeArray(array $settings) : array {
        $normalizedSettings = [];
        foreach ($settings as $key => $value) {
            if (is_string($key)) {
                $key = trim($key);
            }
            if (is_string($value)) {
                $value = trim($value);
            }
            if ($key === '' || $value === '') {
                continue;
            }
            $normalizedSettings[$key] = $value;
        }
        return $normalizedSettings;
    }
    public static function isValidRegularExpression(string $expression) : bool {
        return preg_match('~^(?:\\(.*\\)|\\{.*\\}|\\[.*\\])[a-z]*\\z~i', $expression) !== 0 || preg_match('~^([^a-z\\s\\\\]).*\\1[a-z]*\\z~i', $expression) !== 0;
    }
    public static function isEnabledByPhpVersion(?bool $value, int $phpVersionLimit) : bool {
        if ($value !== null) {
            return $value;
        }
        $phpVersion = Config::getConfigData('php_version') !== null ? (int) Config::getConfigData('php_version') : PHP_VERSION_ID;
        return $phpVersion >= $phpVersionLimit;
    }

}